The following numbers form a series. Find the odd one out.

7, 5, 12, 34, 138, 692

The following numbers form a series. Find the odd one out.

227, 222, 210, 199, 157, 112

The average of three numbers is 30. The ratio of 3rd number and sum of the 1st and 2nd number is 16: 29. What is the sum of 1nd and the 2rd number?

The average age of three friends, Shubham, Omkar and Sucharu is 12 years. The ratio of age of Shubham to Omkar is 5:4. If the age of Omkar is 3 years more than the age of Sucharu, then find the age of Sucharu, 4 years before.

The following numbers form a series. Find the odd one out.

96, 133, 200, 291, 408, 551

552 ml of mixture contains milk and water in the ratio of 12:11, respectively. Find the quantity of milk that must be added into the mixture so that ratio of milk to water in the final mixture becomes 5:4.

A bag contains 8 red, 13 green and some blue balls. If three balls are drawn from the bag one after another and without replacement then find the probability of getting three different colour balls given that total number of balls in the bag is 40.

A train crosses a 360-metre-long platform in 24 seconds, and the same train crosses a tunnel 50% longer than the platform in 33 seconds, then find the speed of train in km/h.

A certain sum of money invested at 20% per annum for 2 years compounded annually, but if interest would have been compounded half yearly on the same amount, then Rs. 241 more interest would have been received. Find the sum of money invested.

Average age of a class of 28 students is 19 years. Average age of all the boys in the class is 21 years. Find the total number of boys in the class if the average age of all the girls in the class is 17 years 6 months.